A kind of medical orthodontic forceps and the processing method of medical orthodontic forceps knife edge

Abstract

The invention relates to a clamp, scissor or knife type product in medical appliances, in particular to a medical orthodontic clamp and a processing method of a cutting edge of a medical orthodontic clamp. The medical orthodontic clamp comprises a base body used as a clamp head, wherein the cutting edge formed by alloy powder coats the base body in a laser cladding way; the cutting edge is made of iron-base alloy powder; and the iron-base alloy powder is obtained through smelting C, Cr, W, Mo, Ni, Si, Nb, B, RE and Fe and making the materials into powder. In the laser smelting coating process of the alloy powder used by the cutting edge, a proper amount of chromium carbide, tungsten carbide, molybdenum carbide and the like is formed; the contents of Si and B are reduced; the improvement of the hardness of the cutting edge is facilitated; the partial carbon quantity is consumed through the formation of the chromium carbide, the tungsten carbide, the molybdenum carbide and the like, so that the base body becomes low-carbon martensite with toughness; and meanwhile, the chrome content is high, so that the corrosion-resistant performance of the cutting edge is superior to that of the base body.

Description

technical field [0001] The invention relates to pliers, scissors and knives in medical instruments, in particular to a medical orthodontic pliers and a processing method for the edge of the medical orthodontic pliers. Background technique [0002] Orthodontic forceps are commonly used medical devices in dental surgery. The complete set of oral forceps has more than 20 different specifications, which are used for bending, twisting and cutting high-grade metal wires such as cold-worked stainless steel and titanium alloys with different diameters. Surgical forceps are operated in the oral cavity, requiring surgical instruments to be easy to clean and disinfect, and require high corrosion resistance. Therefore, high-grade stainless steel is generally used to increase the hardness of the cutting edge by quenching. This method has the phenomenon that the hardness of the cutting edge is not enough and the hardness of the pliers body is too high. , the hard alloy sheet is welded on...

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Problems solved by technology

Therefore, high-grade stainless steel is generally used to increase the hardness of the cutting edge by quenching. This method has the phenomenon that the hardness of the cutting edge is not enough and the hardness of the pliers body is too high. , the hard alloy sheet is welded on the cutting edge to improve the hardness and wear resistance of the cutting edge, but due to the poor bonding force between the alloy sheet and the substrate, the cutting edge cracks or peels off during use; due to the alloy sheet, the inlay material and the The substrate is made of different materials, and there is a potential difference, which makes the inlays easily rust when the forceps are sterilized

[0003] Although there is an invention patent "Invention Name: A Method for Processing Medical Pliers and Medical Pliers Edges, Announcement No.: 101940488 B", it involves a processing method for medical pliers edges, which uses laser cladding nickel-based alloy materials (C: 0.6 to 1.0 , Cr: 14 ~ 18, Si: 3.5 ~ 5.5, B: 3.0 ~ 4.5, Fe: 0 ~ 15, the balance is Ni) as the cutting edge, but from the perspective of its material composition ratio, it belongs to Ni60 commercial powder for thermal spraying , is not suitable for laser cladding, that is, no matter what laser process parameters are used, cracks are prone to appear in the cladding layer. Secondly, before the laser cladding of this patent, a groove needs to be made in the pliers body blank. The process is complicated and it is difficult to adapt to the manufacture of medical pliers. and performance requirements

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